| 1917 | K17 | Completed |
| 1941 | P222 | Launched |
| 1941 | Thule (P325) | Laid Down |
| 1941 | Tudor (P326) | Laid Down |
| 1942 | Unruffled (P46) | HMS Unruffled torpedoes and sinks the Vichy-French merchant Liberia about 7 nautical miles north-east of Mahdia, Tunisia. |
| 1942 | P614 | HMS P-614 attacks the German submarine U-408 with torpedoes in the Arctic Ocean. All torpedoes miss. The crew thought they had sunk the target and the skipper (Lt. Beckley) even received a DSO for the sinking. |
| 1942 | Traveller (N48) | HMS Traveller ended her 3rd war patrol at Beirut |
| 1943 | Sirdar (P226) | Completed |
| 1944 | Sceptre (P215) | HMS Sceptre torpedoes and sinks the Norwegian merchant Vela and the German minesweeper M 132 about 11 nautical miles west-south-west of Norway. |
| 1945 | L26 | HMS L-26 scuttled Halifax approaches |
| 1945 | Achates (P433) | Launched |
